Key Features High Back Ergonomic Design - Features a high back (19" x 17") and widened seat (16" x 16.5") designed to support your body's natural curve, helping alleviate cervical pain, low back fatigue, and hip pressure during extended periods of sitting. The thick sponge-padded cushion enhances comfort. Excellent Durability and Stability - Built with heavy-duty, rust-proof aluminum alloy hinges that ensure stability, especially in rough waters. The waterproof and wear-resistant PVC leather further enhances durability. Strong Weight Capacity and Simple Assembly - Supports up to 250 lbs, thanks to a stable injection-molded plastic frame. Easy to assemble with 4 screws and clear instructions. Compatible with most 4-bolt swivel or pedestal mounts (pedestal not included) or can be used on the deck. Easy to Fold and Store - The folding design allows you to flip up the backrest when needed and fold it down for space-saving storage. It includes a tie-down strap for securing the seat. Great P